/Engine/Source/Runtime/Engine/Public/MaterialCompiler.h
virtual int32 StrataSingleLayerWaterBSDF ( int32 BaseColor, int32 Metallic, int32 Specular, int32 Roughness, int32 EmissiveColor, int32 TopMaterialOpacity, int32 WaterAlbedo, int32 WaterExtinction, int32 WaterPhaseG, int32 ColorScaleBehindWater, int32 Normal, const [FString](API\Runtime\Core\Containers\FString) & SharedLocalBasisIndexMacro, [FStrataOperator](API\Runtime\Engine\Rendering\FStrataOperator) * PromoteToOperator )